Hello
Any knocking noise is more than likely due to worn connecting rod bearings, Crankshaft main bearings or piston or piston pin noise. Connecting rod bearing knocks and piston related noise quite some with warm up, piston noise tends to go completely away after about 5 minutes of run time, but there are exceptions to that run like a cracked piston skirt, crankshaft bearings don't quite very much. It would be my best quests without hearing the noise that you may have either a connecting rod or piston related noise. The best thing to do here is have a trained ear listen to the noise, any experienced technician will know very quickly what the noise is and where it is coming from. These types of noises are only common on high miles engines, with at least 100,000 miles on them is the general run or the engine has been run very low on oil repeated times, or the oil not changed at regular intervals or the engine has been severely overheated. My experience? 35 years as a dealer technican. I'm Master certified in all phases of auto and light truck repair.
Although the vehicle has 98000 miles on it we have taken very good care of it.I have had regular oil changes, have never had it run low on oil, it does not leak oil, it does not run low on oil and has never had the engine overheated. Could it be something else that is making the noise ? We just had the serpentine belt replaced, filled it with premium fuel and added fuel injector cleaner.
No I have given you th emost common resons for this type of knock. Like i said I really need to hear it for myself, which of course I can't do.
i have the same problem dennis, i was wondering if i record a video of the sound and upload it to youtube could you listen to the sound for me and possibly tell me what it is?
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